Di Maria signed a five-year contract on Tuesday, with Manchester United executive Ed Woodward hailing the deal as "legally watertight".

"We're delighted to welcome Angel di Maria to Manchester United's warm, unyielding embrace," Woodward said. "I'm sure he will enjoy the next – and final – chapter of his career, but if he doesn't, well, there's absolutely nothing he can do about it."

Woodward took the unusual step of reading out the contract's small print, which consisted mostly of various types of natural disaster that would fail to invalidate it.